Given the following data, find the least squares regression line that models the data. 
Definitions:
Alcoholism
A chronic disease characterized by uncontrolled drinking and a preoccupation with alcohol.
Gross Sales
The total amount of sales recorded before any deductions for returns, allowances, or discounts.
Sales Discounts
A reduction in the price of a product or service that is offered by the seller, often to prompt early payment or bulk purchases.
Sales Returns
Transactions involving the return of sold goods by customers, resulting in a reduction of revenue.
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